Light quality and phosphorus interaction effects on root morphology and phosphatase activity of phosphorus deficient tolerant and intolerant Azolla spp.

Date

3-1991

Degree

Bachelor of Science in Biology

Major Course

Major in Cell Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Arcelia A. Alejar

Abstract

The growth performance of Azolla pinnata 704 (minus P intolerant) and Azolla caroliniana 304 (minus P tolerant.) in the presence and absence of phosphorus was compared under white, blue, yellow, red and far-red light. Results showed that the red and blue light were most favorable for longer root length, increased biomass production and nitrogen content of the fern at both levels of phosphorus. A significant effect of far red light in both species was obtained. The root phosphatase activity was not significantly affected by the different light quality. However, there was a lower enzyme activity in the presence of phosphorus in O. COr011,10r, It was found out that a greater number of roots were detached in A. pinnata than A. caroliniana more marked in the absence of phosphorus. Also, roots turned brown in A. pinnata at all light quality while a reddish-brown discoloration of fronds was observed in A. caroliniana at all light quality except in white light.

The above results suggest that different light quality have significant effect on root morphology, biomass production and nitrogen content of the fern and appears to effect on root phosphatase activity but the degree of the above responses to phosphorus deficiency was observed to differ between the two Azolla species.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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